[salamander]

You need to reassign your C2500 preamp source input to the digital input you plug your coax cable from the CD player into. I believe the coax inputs are DIG3 and DIG4 on the C2500 preamp (DIG1 and 2 are toslink). For example, if you plugged the coax cable into DIG3 on the preamp, and you wanted to reassign your CD source input to use DIG3, you would do so using the buttons and knobs on the preamp (not the remote) as follows: Turn on preamp and press and hold the Tone Bypass/Setup button to enter Setup mode Press Output 2/Menu button repeatedly until Setup:Source input appears on the preamp display . Rotate the Input knob on the preamp until CD appears on the display. It will most likely show RCA as the input. To change it to DIG3, rotate the Volume knob on the preamp until DIG3 appears on the display. Press Tone/Bypass button to exit Setup. You should now be able to get sound from the CD player simply by selecting CD as your input source. Hope this helps.